- the chemical element of atomic number 22, a hard silver-gray metal of the transition series, used in strong, light, corrosion-resistant alloys. (Symbol: Ti)
One of the transition metals, titanium is a common element in the earth’s crust; the main sources are the minerals ilmenite and rutile. Very large quantities of the dioxide are manufactured for use as a white pigment in paper, paint, etc.
late 18th century: from Titan, on the pattern of uranium